OMG! Ubuntu! shows you how to upgrade to GNOME 3.8 in Ubuntu 13.04
Ubuntu 13.04 ships with an older version of the GNOME desktop in its archives. This is great for GNOME-fans wanting stability, less great for those wanting to try the latest release.How To Upgrade to GNOME 3.8 in Ubuntu 13.04
Thankfully the GNOME team make it easy to install/upgrade to GNOME 3.8 on Ubuntu 13.04 – and there are plenty of reasons why you might want to do that!
There are caveats aplenty – largely that some of the software is a little unstable – but chances are if you’re competent enough to upgrade your desktop you’re also okay to deal with whatever issues might arise.